removing unnessecary basestring check

Author: lukeis

Diff for: py/selenium/webdriver/firefox/firefox_profile.py

@@ -30,11 +30,6 @@
 except ImportError:
     from io import BytesIO
 
-try:
-    basestring
-except NameError:  # Python 3.x
-    basestring = str
-
 from xml.dom import minidom
 from selenium.webdriver.common.proxy import ProxyType
 from selenium.common.exceptions import WebDriverException